First Slide Broken

Hello,

I’ve recently come across an issue with the 10Web Slider. It seems the first slide does not show up, or only the background image layer shows up without additional layers. Im using it with WP-Optimize, however disabling it didnt seem to do the trick so it seems to be a plugin issue. I’m unsure if its related but I’m getting this message in the console:

Uncaught TypeError: Cannot read properties of undefined (reading ‘concat’)
at jquery.mobile.js?ver=2.2.49:2:3063
at jquery.mobile.js?ver=2.2.49:2:3623
at jquery.mobile.js?ver=2.2.49:2:113
at jquery.mobile.js?ver=2.2.49:2:130

The page I need help with: [log in to see the link]